(Butadiene)iron tricarbonyl is an organoiron compound with the formula (C4H6)Fe(CO)3.

It is a well-studied metal complex of butadiene.

[1] An orange-colored viscous liquid that freezes just below room temperature, the compound adopts a piano stool structure.

[2] The complex was first prepared by heating iron pentacarbonyl with the diene.

[3] Iron(0) complexes of conjugated dienes have been extensively studied.